The dependence of AGN activity on stellar and halo mass in semi-analytic models

	The dependence of AGN activity on stellar and halo mass in semi-analytic models
	Fontanot, Fabio 1; Pasquali, Anna 2; De Lucia, Gabriella 1; van den Bosch, Frank C.3; Somerville, Rachel S.4,5; Kang, Xi2,6
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2011-05-01
卷号	413 期号:2 页码:957-970
关键词	galaxies: active galaxies: evolution galaxies: formation
ISSN号	0035-8711
英文摘要	Active galactic nuclei (AGN) feedback is believed to play an important role in shaping a variety of observed galaxy properties, as well as the evolution of their stellar masses and star formation rates. In particular, in the current theoretical paradigm of galaxy formation, AGN feedback is believed to play a crucial role in regulating star formation activity in galaxies residing in relatively massive haloes, at low redshift. Only in recent years, however, has detailed statistical information on the dependence of galaxy activity on stellar mass M-, parent halo M-DM mass and hierarchy (i.e. centrals or satellites) become available. In this paper, we compare the fractions of galaxies belonging to different activity classes (star forming, AGN and radio active) with predictions from four different and independently developed semi-analytical models. We adopt empirical relations to convert physical properties into observables (H alpha emission lines, O iii line strength and radio power). We demonstrate that all models used in this study reproduce the observed distributions of galaxies as a function of stellar mass and halo mass: star-forming galaxies and the strongest radio sources are preferentially associated with low-mass and high-mass galaxies/haloes, respectively. However, model predictions differ from observational measurements in many respects. All models used in our study predict that almost every M-DM > 1012 M-circle dot dark matter halo and/or M- > 1011 M-circle dot galaxy should host a bright radio source, while only a small (few per cent) fraction of galaxies belong to this class in the data. In addition, radio brightness is expected to depend strongly on the mass of the parent halo mass in the models, while strong and weak radio galaxies are found in similar environments in data. Our results highlight that the distribution of AGN activity as a function of stellar mass provides one of the most promising discriminants between different gas accretion schemes.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	SUPERMASSIVE BLACK-HOLES ; STAR-FORMING GALAXIES ; N-BODY SIMULATIONS ; DIGITAL SKY SURVEY ; GALACTIC NUCLEI ; COOLING FLOWS ; HOST GALAXIES ; X-RAY ; SATELLITE GALAXIES ; COSMOLOGICAL SIMULATIONS
收录类别	SCI
语种	英语
WOS记录号	WOS:000289904600018
公开日期	2012-08-07
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/4522]
专题	中国科学院紫金山天文台
作者单位	1.INAF Osservatorio Astron Trieste, I-34131 Trieste, Italy 2.Max Planck Inst Astron, D-69117 Heidelberg, Germany 3.Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA 4.Space Telescope Sci Inst, Baltimore, MD 21218 USA 5.Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA 6.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Fontanot, Fabio,Pasquali, Anna,De Lucia, Gabriella,et al. The dependence of AGN activity on stellar and halo mass in semi-analytic models[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2011,413(2):957-970.
APA	Fontanot, Fabio,Pasquali, Anna,De Lucia, Gabriella,van den Bosch, Frank C.,Somerville, Rachel S.,&Kang, Xi.(2011).The dependence of AGN activity on stellar and halo mass in semi-analytic models.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,413(2),957-970.
MLA	Fontanot, Fabio,et al."The dependence of AGN activity on stellar and halo mass in semi-analytic models".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 413.2(2011):957-970.